Year	%
1990	51.47516435555428
1991	50.86759870041347
1992	50.24227491581715
1993	47.45316981135961
1994	47.37768317670699
1995	47.09708454251195
1996	47.08054774758575
1997	46.92988916041116
1998	46.489814707094645
1999	45.64105516142513
2000	45.50742785858724
2001	45.192260613533556
2002	44.57122518858293
2003	43.85616205427142
2004	43.225207569816796
2005	42.45357981735389
2006	41.948165157384125
2007	41.38368255222302
2008	40.70293203252026
2009	40.0112615675902
2010	39.87341309542913
2011	39.51294337806947
2012	39.21635207600268
2013	37.954810988696174
2014	38.10103127612767
2015	37.76015214227514
2016	37.6182269150452
2017	37.41934252235935
2018	37.34861574427844
2019	37.18525658150889
2020	37.13404072995281
2021	37.07323113417918
2022	37.060899714943744